The Marvel movies have been pretty loyal to the their comic book counterpart, so I can only assume the only deviance from the origins will to better tie in the Avengers stories of Thanos being the ultimate villain after he collects all the Infinity Stones.
RONAN THE ACCUSER - Lee Pace
Ronan was born on the planet Hala, the capital of the Kree Empire in the Greater Magellanic Cloud. Ronan is a member of the alien Kree ace and a member of the Accuser Corps, who are the Kree equivalent of military governors and jurists. His rise through the ranks was extraordinary, and he eventually became the third-most powerful being in the Kree Empire. The Supreme Intelligence appointed him “Supreme Accuser of the Kree Empire,” and in this role he is known simply as “Ronan the Accuser”.
Ronan possesses superhuman strength, endurance, speed and reflexes; which are enhanced by devices in his suit of full-body exoskeleton armor. Ronan also has devices in his armor which create fields of invisibility, and devices in his gauntlets which generate sufficient coldness to place certain life forms into a state of suspended animation. Ronan also possesses a weapon called the "Universal Weapon", a device which uses cosmic energy for a variety of effects according to the wielder's will, including the disintegration, rearrangement, and transmutation of matter, the projection of concussive energy blasts, the absorption of energy, control over gravity, the creation of force fields and "time-motion displacement fields" and interstellar teleportation along hyperspatial passages. (source: Wikipedia)
A brutal space pirate and mercenary, Nebula seized control of Sanctuary II, a massive spaceship previously under the command of Thanos. Thanos was believed to be dead at this point, and Nebula claimed that he had been her grandfather. Nebula’s band of mercenaries and pirates consisted of Skunge,Kehl, Gunthar, and Levan.
Nebula is an athletic woman and an excellent armed and unarmed combatant. She possesses a gifted intellect and is a brilliant battle strategist.
Nebula uses blasters worn on her wrists that fire concussive blasts of unknown energy or heat blasts that can incinerate a human being almost instantly. She also apparently wears a device that enables her to disguise her appearance, either through illusion-casting or through actual molecular rearrangement of her body and clothing. (source: Wikipedia)
Karen Gillan as Nebula
TANELEER TIVAN / THE COLLECTOR
The Collector has the power of prophecy, allowing him to foresee the rise of a being powerful enough to pose a threat to the Elders: Thanos. To protect life in the universe, the Collector created a massive museum of countless life forms to keep them safe from Thanos. For a time, he even possessed one of the six Infinity Gems, unaware of its true power, until Thanos took it.
The Collector possesses the ability to manipulate cosmic energy for a variety of effects, including projecting concussive force beams, and the increasing of his size and mass (and hence physical strength) at will. He also possesses limited shape-changing abilities. His precognitive abilities give him brief visions of alternate future, although he must meditate for long periods to identify the individuals he sees in the vision and its apparent point in time. He has telepathic abilities that enable him to make limited contact with the minds of other Elders. Due to a vow by Death, Collector and all the Elders cannot die and are effectively immortal.
Benicio Del Toro as The Collector
Yondu Udonta is a member of the Zatoan tribe, primitive beings native to Centauri IV. He functions as a hunter. His homeworld was the first planet to be colonized by humans that was outside Earth’s solar system. Yondu is born in the late thirtieth century. Yondu’s people had fled from contact with overwhelming earth colonizers who had begun arriving in 2940 A.D.
As a member of the alien race of the planet Centauri IV, Yondu possesses an intuitive mystical "sixth sense" perception that permits him limited empathic relationships with other lifeforms. He is also sensitive to mystical beings and forces and is able to detect their presence and activities without effort. By going into a trance, Yondu is able to replenish his own inner strength by communing with natural forces. (source: Wikipedia)
Michael Rooker as Yondu
KORATH THE PURSUER
Korath-Thak is an agent of the Kree Empire. He was a cyber-geneticist, and the founder and head of the Pursuer Project to develop cybernetic warriors for the Kree militia. He has also been a munitions manufacturing plant foreman, and a special operative of the Supreme Intelligence.
He has superhuman strength, stamina, and durability. He also has the ability to psionically locate individuals by tracing their brain patterns. Like other Kree, Korath has the inability to breathe in Earth's atmosphere without a special apparatus or breathing serum. Korath wears an armored battle-suit and helmet composed of unknown alien materials. He wields two 1½ foot beta-batons which generate electrical force capable of stunning opponents into unconsciousness on contact or disrupting functions of electrical devices. By adjusting the batons, Korath can stun beings as powerful as Eternals or even intangible beings. He is capable of flight via electrically powered turbines in his boots. (source: Wikipedia)
Djimon Hounsou as Korath
Rhomann Dey was the leader of the Nova Corps of Xandar and one of its few survivors. When the Warlord Zorr attacked Xandar, he devastated it and killed many Xandarians including Dey’s wife and children. Dey hunted Zorr and battled him. (source: Marvel Wiki)
John C. Reilly as Rhomann
COMMANDER RAEL – Glenn Close
After the destruction of the Nova Corps by the Annihilation Wave, the Xandarian Worldmind secretly sought out new recruits during Richard Rider’s sleep hours. Irani Rael, a Rigellian, was among those first selected to be a new Nova Centurion. Soon after her selection, the Worldmind transmitted an emergency signal as the result of nearly being destroyed by Galactus. Irani joined with the four other Centurions to have been selected thus far Qubit, Malik Tarcel, Morrow and Fraktur — and tracked down the Worldmind’s signal. (source: Marvel Wiki)
For the heroes post *click here*
And now we wait... 5 months!
I can't wait that long brb freezing myself.